had to re wire my car trailer lights due to the old converter box not working. put all new wires and converter box in, tested them with a light tester. they all work right. problem is , hooked up to the camoer, the lights do not come on. does the camper need to be hooked up to the hitch to work? is there a switch or fuse in the camper? ahhhhh my brain is fried. need help. also does it have to be down for lights to come on?

yes i have tested the 7 pin plug. yes i know how. the inner lights all work. from the end of the plug on the car everything works, i rewired the car twice with all new wires , hopkins 46155 custom wire set. every wire and connector was tested. as i said all lights on camper work with the exception of running lights and brake /blinker lights. when i plug in from car to camper, there is where the power stops.

Now the 2nd system.
You have power to the 7 pin on the TV. And all of the turn signals, brake lights, etc work at the 7 pin?
Now, plug in the 7 pin to the trlr and test where the power goes on the trlr. trlr may be wired incorrectly.
Mine is old and has a multi post strip that all of the connections are assembled to. It is in the pump box in the A frame.
These connections may have been moved and not relaying power to the right point.
TRLR must be attached to the TV thru the hitch for ground to make the running lights work.
If no power to the lights, you will have to work backwards to find out why.

There are no fuses on the trlr that control the trlr running lights. Those are fused on the TV fuse box.

Just a maybe, but I use a small jumper wire and jump from the 11 o'clock to the 1 o'clock on the TRLR plug. Top of the plug being the lug. This power comes from the TRLR batt. Only the running lights and tail lights will light, up NOT brake or blinkers. But this should tell you if your getting power back there.
Tree

ok sorry i did not reply earlier but have been very busy packing camper for trip to gulf coast in the morning. lights are working . how ? well wife said put camper down , maybe it has to be down to work. so i put it down and lights magicly work. who knew? thanks everyone for the help.